The Unbeaten crew had embarked on their 4th patrol on 8 of July. Things on the domestic front would be slightly different during this patrol. The boat was only being victualed for one meal per day per man. The reason for this is not known by the author but one can surmise it may have something to do with the reduced availability of food on the island during the siege. This patrol was wholly un-eventful. The boat returned to Malta on 19 July 1941. Unbeaten would remain alongside the lazaretto and not embark on her fifth patrol until the 28th of this month. Sad times befell the crew of Unbeaten during their time alongside. The news filtered through that a fellow U-Class submarine HMS/M Union was sunk only days before, with the loss of all hands.